#include<stdio.h>
#include<math.h>
int su(int x){
	int c,a;
	double b;
	b=sqrt (x);
	for (c=2;c<=b;c++){
		if(x%c==0){
			break;
		}
	}
	if(c>b)
		a=1;
	else
		a=0;
	
	return a;
}
int main (){
	int d;
	scanf("%d",&d);
	if(su(d)==1)
		printf("ÊÇËØÊý");
	else
	printf("²»ÊÇËØÊý"); 
	return 0;
}